Liddell-Scott-Jones

αἴξ (aix) a goat G:N-M

αἴξ, αἰγός, ,

h(: dative plural αἴγεσιν[Refs 8th c.BC+]; also Boeotian dialect ἤγυς, ={αἴγοις}, [Refs]:—goat, mostly feminine, μηκάδας αἶγας[Refs 8th c.BC+]

__2 αἲξ ἄγριος wild goat, probably ibex (compare αἴγαγρος), ἰονθάς[Refs 8th c.BC+] —proverbs, αἲξ οὐρανία in Comedy texts as a source of mysterious and suspected wealth, in allusion to the horn of Amalthea, [Refs 5th c.BC+]; αἲξ τὴν μάχαιραν (i.e. ηὗρε), of those who 'ask for trouble', [Refs 2nd c.AD+]; αἲξ οὔπω τέτοκεν 'don't count your chickens before they are hatched',[Refs 1st c.AD+]; κατ᾽ αἶγας ἀγρίας, ={ἐς κόρακας}, [Refs 3rd c.BC+]; αἰγῶν ὀνόματα, of worthless objects, [Refs]
__3 the star Capella, [Refs 4th c.BC+]
__II a water-bird, apparently of the goose kind, [Refs 4th c.BC+]
__III fiery meteor, [Refs 4th c.BC+]
__IV in plural, waves, [Refs 2nd c.AD+]